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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
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    <title>Document</title>
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<body>
    <script>
        // var message='saojkl'
        // let address = 'as'
        // // 会放到词法环境的script对象里面
        // const foo=function foo (){
        //     let aaa='123123'
        //     debugger
        // }
        // foo()

        foo()
        function foo() {
            console.log('foo');
        }
        // foo()
    </script>
</body>

</html>